Pipe cut-off machine



Sept. 13, 1932. 'J READEY 1,877,198

PIPE CUT-OFF MACHINE Filed July 21, 1930 5 Sheets-Sheet 1 fizz/mi r- I flfiddf 37 71 M /ma.

Sept. 13, 1932. I J-. M. READE-Y 1,877,198

PIPE CUT-OFF MACHINE Filed July 21. 1950 3 Sheets-Sheet 2 Sept. 13, 1932. V J READEY 1,877,198 v PIPE CUT-OFF MACHINE Filed July 21. 1930 3 Sheets-Sheet- 5 o 7 I39 /6 M" gal e/a/m ea Patented Sept. 13, 1932 ewe sj'ra'rss PATENT or! JOHN M. READEY, ors'r. .roursiviissounr, ASSIGNOR To JOHN M. READEY, me, or-s'r.

Loprs, 'iyrrssounr, A conrorm'rron OF DELAWARE rrrn cunorr MACHINE Application filed m 21,

This invention. -re lates; -to new-{and useful improvements in .pipe cut-ofl' machines, the objects of the invention'being the provision ofa cut-off machine havinga revoluble cutter arranged in stationary bearing and havinga pipe support operable by fluid pressure to raise the pipe supporte 1; -thereon and bring.

zo being adjustable to bring various rollers in.

sup orting positions so that said pipe-cut off mac ine is readily adaptable for operat on upon various sizes of pipes without-requir ng the replacement of the pipe supports or parts za thereof. t

Additional objects of the invention ar eto improve the construction of pipe cutoff .machines so as to render it more efficient in operation and enable the production of short lengths of pipes and nipple blanks and the like on. a large scale and in an inexpensive manner. e i V l/Vith these and other objects in view, my

invention consists incertain novel features.

of construction and arrangement of parts, hereinafter more fully describedand claimed, and illustrated in the accompanying drawings, in Which improved pipe cut-off machine.

Figure 2 is a front-elevation thereof. Figure 3 is anenlarged vertical crosssection taken on line 3-8 of Figure 1.

Figure-t is an enlarged vertical cross section taken on line of Figure 1. I

Figure 5 is an enlarged detail view, partly in cross section, of the height regulating Ineans.

Figure 6 'is;a cross sectionof thevalveuti- A Figure 1 1s a slde elevatlonal vlew 0 my I Support,compnsesyapcage19 .plvotauy mount 90 ed ona horizontally disposedshaft20. Two

1930. Serial No. 469,378. 7

lizedlto control the admission .of fluid tothe N 7 cylinder.

' rI-Ieretofore in the operation ofmachinesof this type-the pipe support was raised by 'means of a pedal which actuated asuitable s cam shaft and rocked a cam carried thereby. This cam, when actuated,raised, throughan adjusting screw, the support carrying the pipe so that the latter was brought intoengagement with the cutter. This arrangement has notbeen satisfactory as the production was notfast enough to enable the manufacture of the product ona satisfactory commercial basis. This was partly due to the fact that the support and the pipe carried 365 thereby were raised by the force applied by the operator who also had to supervise the-operation of the machine.

In, my present invention, I utilize compressed air to raise the pipe support and; the I'm operators energy is reserved for operating the valve controlling the admissionof com: pressed air to the operating cylinder so that .he can devote more attentionto theoperation of'the machine and the production rate .canbe considerably increased.

Referring by numeralsto the accompanying drawings, 10 indicates a support or frame provided with abase 1 1, and carrying at its upper end a rotary cutter or disk 12. This: disk is mounted onia horizontally' dispo'sed revoluble shaft 13. which is mounted in bearing .14: of sai'dframe l0. Shaft 13 is actuated by any suitable mechanism, such as gearing 15. The driving shaft 16 canbe driven either by V anelectricmotor or,as shown, by a pulley 17 A pipe support 18 is disposed below cutter 12 and is operable in a vertical plane to -posi tion the pipe relatively to said cutter. This or morepairsof rollers. 21 and 22 are provided-on said cage. These rollers are freely {mounted in said cage and said, parts are of different sizes so that the largerollers 21 can be used to support the smaller sized pipes and .the small rollers .22 can be large sized pipes.

used to support Shaft 20 is mounted in asuitable bearing which is carried by the upper end of averti- 00 cally disposed bar 24. This bar is slidably mounted in a bearing 25 projecting outward- 1y from frame 10. The lower end of bar 24 is provided with a bifurcated member 26 in 5 {which is arranged a horizontally disposed stud shaft 27. A roller 28 is freely journaled on said shaft and rests in one of the seats formed in the upper end of an adjusting member 29.

There are two or more seats 29 and 29 arrangedat varying radial distances from the axis of shaft 27. Seat 29 is further away from shaft 27 and when roller 28 occupies this seat the roller cage 19 occupies raised'position. l/Vhen member 29 is moved to cause roller 28 to engage. seat 29 which is deeper and therefore closer to the axis of shaft .27,

the cage 19 occupies depressed position.

, Thus by adjusting member 29 the distance between the rollers of the cage and the cutter canbe varied in addition to the adjustment of the cage itself. A handle 29 is formed'on member 29 to facilitate manual operation I thereof.

Member 29 is mounted by means of a horizontally disposed shaft 30 in the upper end of a vertically disposed plun 'er 31. A bearing32 projecting outwardly rom bar 10 provides a guide for said plunger 31. The lower end of this plunger carries a roller 33 which rides upon a cam 34. This cam is fixed to a horizontally disposed shaft35 and is so shaped that when said shaft is rocked in the direction indicated by the arrow, the high point 35a of said cam is brought into engagement with roller 33, thereby raising plunger 31 and bar 24 so that the pipe supported by the appropriate pair of rollers 21, or 22, is

brought into engagement with cutter 12.

. Shaft 35 is actuated inone direction by a connecting rod 36, one end of which is connected to the upper end of arm 37 whose lower-end is fixed to shaft 35. Connecting rod 36 is connected at its opposite end to a piston rod '38 which carries a piston 39 operating in a cylinder 40.

' cylinder with the atmosphere and allows the air to be discharged from the cylinder. 'VVhen the air pressure is removed from the cylinder,

piston 39 and cam 34 are restored to their normal or inactive positions by means of a coiled spring 46 which is stationarily anchored at one end and is connected at the other end to an arm 47 fixed at its other end to shaft 35. No restoring means are needed a to bring the pipe support and bar 28 to norma-l positions as these are restored of their own weight as soon as cam 33 is brought to home positions.

Preferably a coiled'spring 48 is connected at one end to anextension 27a of pin or shaft 27 and at the other end to an extension 30a ture receiving a pin 50. When cage 19 is properly adjusted, one ofits apertures 49 registers with aperture in extension 2311 so that pin 50 can engagesaid aligned apertures and lock the cage in position.

To look plate 29 in adjustedposition, a pin 51 is used. This can is detachablyseated in an aperture formed in extension 52 of member 31 and is engageable with either one of apair of spaced apertures 53 formed in plate 29 at the appropriate points. The adjustments can be made quickly and require no experienced mechanic. This not only saves.

time but dispenses with the services of expensive labor. I 5

When the adjustments are made, the workman has no other duties to perform except .to feed the pipe to the cutter disk and operate the pedal 43. i

The pedal 43 is used merely to operate valve 42 and the pressure necessary to raise the support 18 and hold the pipe against the cutter disk 12 is furnished by the cylinder 40. The pressure of the fluid used to operatev the piston is regulated so that only the re.-

quired pressure is applied to the piston.

My invention, which isparticularly desir-- able in the manufacture of nipples, is of simple construction and can be attached to existing types of cut-off machines. 7

While I have shown herein the preferred form of my invention, it is obvious that various changes in the construction and arrangement of parts of my improved cut-off machine can be made and substituted for those herein disclosed without departing from the spirit of my invention. 4

I claim: 1. A pipe cut-off machine comprising in combination a frame, a pipe cutter disk revolubly mounted thereon, a slidable'plunger mounted in said frame below said disk for movement in a vertical plane, a roller cage mounted on the upper end, ofsaid plunger and provided with a pair of spaced rollers for supporting the pipe relativelyto said outter, a rock shaft, a cam fixed onsaid shaft and engaging the lower end of said plunger for raising the same, and fluid pressure operated means for actuating said shaft.

I 2. In a pipe cut-off machine, the combination of a support frame, a pipe cutter disk revolubly mounted thereon, a plunger slid ably mounted on said frame for movement 1n a vertical plane, a roller cage mounted on the upper end of said plunger and provided wlth a plurality of seats for supporting a pipe relatively to said cutter, said cage being pivotally mounted on said plunger and said seats being differentially disposed with respect to the axis of said cage whereby pipes of various sizes can be supported by said cage, each of said seats comprising a plurality of rollers, means for locking said cage in adjusted position on said plunger, a rock shaft journaled in said frame, a cam fixed to said shaft, and

a roller riding upon said cam and mounted on said plunger and actuating the latter.

3. In a pipe cut-off machine, the combination of a support frame, a pipe cutter disk operatively mounted on said frame, a pipe support mounted on said frame for movement in a vertical plane relatively to said outter, said pipe support including a cage carried by the upper end of said support, a roller operatively associated with said support, a horizontally disposed rock shaft journaled on said frame, a cam fixed on said shaft and engaging said roller for raising said pipe support and bringing the pipe carried thereby into engagement with said cutter, a rock arm extending from said shaft, a fluid pressure cylinder, a piston operating therein, connections between said piston and said rock arm for actuating said rock shaft, a valve for controlling the admission of fluid to said cylinder, and a pedal for actuating said valve.

4. In a device of the class described, the combination of a support frame, a pipe cutter dislrrevolubly mounted in said frame, a pipe support operatively mounted for movement in a vertical plane relatively to said cutter disk, said pipe support including a vertically disposed slidable bar carrying at its upper end a pair of rollers arranged in spaced relation with each other and adapted to receive the pipe to be operated upon, a vertically disposed slidable plunger 'mounted on said frame below said bar, means carried by the upper end of said plunger for operatively engaging the lower end of said bar, said means being adjustable to regulate the distance below said plunger and said bar, a roller carried by the lower end of said plunger, a rock 7 shaft, a cam fixedon said shaft and engaging said roller for raising and lowering said pipe support, a fluid pressure cylinder, a piston operating therein, means operatively connecting said piston with said rock shaft for actuating the latter by fluid pressure exerted against said piston, a valve in said cylinder for controlling the admission to and the exhaust from said cylinder of a suitable fluid under pressure, and means for actuating said valve.

5'. In a machine of the class described, the

combination of a support frame, a pipe cutter the "upper end oflsaid bar and adjustable relatively thereto to accommodatepipes of various diameters, a vertically -d1s- 5 posed plunger slidably, mounted in said 1 frame below said bar, an adjusting;.mem-

*ber mounted on the :upper end of. said a plunger and engaging ith-slower end of said bar," said member being'adj ustable rtonegi "late the distance between the upper endof said bar anditheupper end of said plunger,

' a roller carried by the lower endofsaid plunger, a horizontally disposed rock shaft,

saidr-ol ler, to raise :said plunger-and said bar and bring the pipe supported :by :said' pipe "support into engagement with saidecutter.

- 16; In a machine-of the class describedfihe J combination of :a support frame, a pipe cuta and a cam fixed to said shaft engaging V ter disk revo lu'bly mounted on :said 'frame,1a

"vertically disposed bar slidably mounted in saidframe, a pipe support membe'rl'car-ried "by the upper :end of ma ter an'd adjustaib'le relatively thereto to :accommodatapipesRof various diameters, 3," vertically'l :di'sposed plunger slidably mounted in saidfiram'e below sairilbar, an :ad usting membermounted-on theupper end of said plunger and-engaging the lower endofsaid iba'r, said member being 1 adjustable to regulate the distance between the upper end of said Ibarand-the upper end of said plunger, a roller car ried'by the lower 'end of said plunger, ia horizontal- 1y disposed" :roc'lgshaft, a cam fixed to said shaftand en'- gaging said rollers, means for operating said rock shaft. V 7

17. llhl :a anachianeof the class described, the

. combination of .a support frame, a pipeout iter disk openatively mounted on said frame, :a I vertically disposed bar slidably mounted Yin said frame, a roller cage mounted 011 theup- :pe-riend "of said :bar,:a pair o-ffrol'leriszmountied said cage and adapted {to support a pipe to ,be operated-upon by .saidacutter, ;a' roller arranged on the lower end of said bar, a vertical ly disposed plunger slidablymounted on said frame below said l et, an adjusting member carried by gth'e upper end of said plunger and operatively supporting theroller of said bar, said adjusting member being adjustable to regulate the position of said cage relatively to saidcutter, a rock shaft jour-y naled in said frame below said plunger, a cam fixed on said shaft and engaging the lower end of said plunger,and a coiled spring for holding said shaft in a position whereby said 7 plunger engages the low point of said cam.

8.7 In a machine of the class described, a1

pipe support means comprising a slidably mounted vertically disposed bar, a roller cage pivotally mounted upon the upper end there-' i p of and including a plurality of rollers arranged in pairs, each pair being differential-" 1 1y disposed'relatively to the. axis of said roller cage for accommodating pipes" of various sizes, means for lockingsaid cagein adjusted position relatively'to said bar, a roller carried by the lower end of said bar, a vertically disposed slidable plunger arranged below said bar, an adjusting plate pivotally mounted on the upper end of said-plunger and provided with a plurality of seats for engaging the roller of said bar, said seats being ofvarious v depths so as to vary the distance between said plunger and said roller cage, a rollercarrled by the lower end of said plunger, a cam engaging said last mentioned roller, and means 7. for actuating said cam to ra1se or lower said plungerand said bar so as to position the pipe supported by said roller cage relatively to the pipe cutting means.

9. In a machine of the class described, the combination with a revoluble pipe cutter disk, of a pipe support means comprising a slidably mounted vertically disposed bar, a roller cage pivotally mounted upon the upper'end thereof, a plurality of horizontally disposed rollers journaled in'said cage and arranged in pairs,,each pair beingcdiii'erentially disposedrelatively to the axis of said roller cage .for accommodating pipes of various diameters, means for locking said cage in adjusted positions relatively to said bar, and means for operating said bar relatively to said pipe cut-. ter disk. I

10. In a machine of the class described, the

combination with-a revolubly mounted pipe cutter disk, of a pipe support means including a slidable vertically disposed bar, apipe engaging means carried by the upper end of said bar, a vertically disposed slidable plunger arranged below said bar, an adjusting plate I pivotally mounted on the upper end of said plunger and provided with aplurality of seats for engaging the lower end of said bar, said seats being of various depths so as to vary the distance between said plunger and the upper end of said bar, and means for engaging the -ower end of said plunger and operating said V j all. i

- In testimony whereof I hereunto aflix my signature this 21st day of June, 1930.

" JOHN M. READEY. 

